Door lock



Aug. 28, 1928.

w. HUTTEMANN DOOR LOCK Filed Sept. 26, 1924 amt WWW.

Patented Aug. 28, 1928.

UNITED STATES WILHELM HuTTEMANN, or COLOGNE, GERMANY.

DOOR LOCK.

Application filed September 26, 1924. Serial No. 740,138.-

This invention relates to a door lock of the kind in which the innerdoor handle is rotatable relative to the outer one.

Door locks of this type have already become known in which the innerhandle has its hollow shaft rotatably mounted on the axle of the outerhandle which is coupled to an abutment ring adapted to freely rotatearound the axle of the outer handle and which ring is adapted toactdirectly or indirectly upon the latch bolt and. to effect, according tothe angular locking position of the inner handle, by rotation of thesame either the locking of the spring bolt or the pulling back of thisspring bolt, the angular locking position of the inner handle beingcaused directly by a push knob on the same. The lock can therefore belocked without key from one side of the door. For opening the same fromthe other side a so-called locking cylinder is provided.

Compared with this known construct on the arrangement according to the1nvent1on consists in that the angular adjusting of the inner handle iseffected directly by hand, the locking positions of the same beingcontrolled by a locking ball arrangement on the abutment ring andfollower, the inner handle freely rotatable being arranged on the axleof the outer handle in such a mannor that a pin eccentrically arrangedon the shaft of the inner handle is guided in an angular groove of theaxle of the outer handle and that latch bolt and elbow lever (the latteras intermediate member for the inner handle and the latch bolt) arestamped from sheet metal, the lock case being composed of two partshaving projections to be 1nserted into slots of the lock cramping boardand connected at the other side by means of screws. the connectionbetween the locking cylinder and the lock case being carried out in aspecial manner.

In the accompanying drawing the lnvention is illustrated by way ofexample.

Fig. 1 shows the elevation the inner parts of a door lock comprising twolocking cylinders.

Fig. 2 is a cross section on line IIII of Fig. 1.

Fig. 3 is a cross section on line III-III of Fig. 1.

Fig. 4 is a cross section on l1ne IV -IV of Fig. 1.

Fig. 5 is a cross section on line V-V of Fig. 4.

Fig. 6 shows in elevation the pivot pin of the locking cylinder.

Figs. 7 and .8 show the abutment ring in two views.

Figs. 9 and 10 are two different views of the follower.

Figs. 11 and 12 are two different views of the elastic ring for thefollower.

The door lock consists of the lock case composed of two parts 1 and 2attached by means of projections 3, 3 in the lock cramping bord 4. Theprojections 3, 3' of the part 1 are riveted on the cramping bord 1, thecorresponding projections of part 2 engaging loosely with the incisionsof the cramping bord so that the lock cases can be taken to pieces. Thetwo parts of the lock case are securely connected the one with the otherby means of a sleeve 5. The quadrantshaped rims of the parts of the lockcase which register accurately with one another when the parts of thelock case are being locked together provide the required hollow spacefor the accommodation of the several elements of the lock.

These elements are :-the latch bolt 6, the

angle lever 7, the abutment ring 8 with an abutment arm 9. the follower10, the elastic ring 11, the spring 12 of the latch bolt, the lockingcylinders 13 and 1 1 for the inner side and for the outer side of thedoor, the dog 15 of the locking cylinders and the clamping bolt 16serving as safety device for the locking cylinders.

The latch bolt 6 can be operated on the one hand by the handles and onthe other hand by the locking cylinders. In the first case the arm a ofthe follower 1O acts upon the angle lever 7 which is made from sheetiron in the special shape shown in Figs. 1 and 2. The angle lever 7 ismounted on a short axle 17. The angle lever Thas an abutment 18 designedto come in contact with the cramping bord 4t and an arm 19 designed toact upon a projection of the latch bolt 6. The latch bolt 6 is movablyguided in an aperture of the cramping bord 4 and on an abutment 20.\Vhen, by means of a handle, the follower is being rotated to the rightthe arm a of the follower acts upon the angle lever which pivots aroundthe axle 17, the arm 19 pulling the latch bolt 6 back. The spring 12 ofthe latch bolt, which bears on the one hand against the abutment 20 ofthe lock case and on the other hand against the abutment 21 of the latchbolt brings the latch bolt back to the position of rest. The pullingback of the latch bolt. 6 by thelocking cylinder is effected through theintermediary of the dog 15 which acts upon an abutment 22 of thelatchbolt so that, when the pivot bolt 15 is turned to the right in thelocking cylinder with the aid of the key the latch bolt is pulled'back.This movement can be executed with the aid of the locking cylinder 13and of the looking cylinder 14, with which object in view the dog 15 isindependent of the rotatable cylinders 23 and 21 of the lockingcylinders.

The pulling back of the latch bolt by means of the inner handle iseffected in a similar manner as by means of the outer handle, butthrough the intermediary of the abutment ring 8 which actsin this casewith an angular abutment upon the arm I) of the follower and causesthereby the rotation of the follower to the right, as the inner handleis loosely mounted on the handle axle, as can be seen from Fig. 4 whichshows thatthe shaft 25 of the inner handle (Fig. admits an angularrotation of 90 around the handle axle as the handle axle has an angulargroove 26 in which a stud 27 of the axle shaft is guided which serves atthe same time to prevent removal of the handle from the axle.

The shaft 25 of the inner handle is coupled with the ring 8 by means ofstuds 28 which engage with corresponding incisions of the handle shaft.

The inner handle can be brought into three positions, the first positionbeing the normal horizontal position, in which by simple depression ofthe inner handle the latch bolt is pulled back.

In this position the latch bolt can be pulled back also by simpledepression of the outer handle The second position of the inner handleis displaced 45 and the third position 90. In these angular positionstheinncr handle is locked, by a special locking ball mechanism, on theabutment ring and on the, nose. The locking mechanism is constructed sothat in the abutment ring two catch balls 29 are located at an angle of180 said balls being thicker, or having a greater diameter, than thewall of the abutment ring 8, so that the balls project from the surfaceof the ring. The projecting portions of the balls engage withcorrespondingly shaped cavities 30 in the follower 10 (Figs. 9, 10) sothat, when the ring is being rotated by means of theinner handle, the

follower 10 is pushed back, through the action of the spring 11 (Figs.11, 12) by the balls which now get out of .the cavities 30 to engageagain with the next following cavities under the action of spring 11whereby the innervhandle is adjusted-in the next following angularposition. There are three pairs of cavities arranged in the surface ofthe follower in accordance with the three positions of the handle.

The follower 10 is returned into the original postion b the action ofthe ring-shaped spring 11. The shaft 31 of the outer handle comprises aportion 32 of square cross section for the follower and a cylindricalportion 33 onwhich the inner handle is rotatably mounted.

In the horizontal position of the inner handle the abutment 9 of ring 8occupies the position shown in Fig. 1. W'hen the inner handle is turnedthe abutment 9 and the angular abutment c participate in this angularrotation so that abutment 9 comes in front of and in contact with theangle lever 7 so that the angle lever and consequently the outer handleare locked and cannot execute an angular rotation. The outer handle isloc ed at this position of the inner' handle and cannot be operated byhand. The latch bolt is not impeded in its movements that it can bepulled back by means of the locking cylinder if the dog 15 is rotated,if the dooris slammed it is automatically pushed back and locked.

lVhen the inner handle is turned the abutment 9 of ring-8 gets in frontof the abutment 3 1 of the latch bolt 6 and locks the same. In thisposition of the inner handle the angle lever 7 and the outer handle areloclc'ed and the latch bolt cannot be pulled back with the aid of thelocking cylinders 13 and 14. The fixation of the lockin cylinders, whichcan be carried out only if the lock has been mounted in'thc door iseffected in such a manner that two projec- .tions 35 provided on theends of the locking cylinders, displaced the one with re gard of theother are made to engage with corresponding apertures 36 of the parts 1and 2 of the lock case from the outer side and then turned 90, into theposition shown in Fig. 1, these projections v3.") coming thus into closecontact with the walls of the lock case. In order to make it possiblethat the two cylinders 13 and 14- 'are simultaneously rotated they areconnected by a pin 37 fixed on the one cylinder and which is insertedinto the other cylinder if the two cylinders are inserted and both atthe same time into the lock case.

In order to lock the cylinders against back rotatioira clamping bolt 16is arranged between the lock case and one of the cylinders and engagespartly into a corresponding groove of the one of the cylinders. Thisclamping bolt 16 is inserted from the side of the cramping board 4,after the locking 'cyl inders 13 and 14 have been inserted, and having ascrew bolt securely screwed on the cramping board 4. The dog 15 (Fi 2)of the two locking cylinders is mounte in one of the cylinders (forinstance the cylinder 14) like a stud. and it, is securely but rot atably journaled in the two end plates of the locking cylinders. Thelocking cylinder 13 has two abutments 38 for the dog 15 when it is beingbrought into the position for locking the latch bolt. The dog 15 has across shaped incision 39 in order to be gripped by the key in thehorizontal position or in the vertical position.

I claim 1. A door lock of the type described comprising in combinationan outer door handle, an inner door handle rotatable relative to theouter handle, a spindle for said inner handle a latch bolt, a followerconnected to said outer door handle a rotatable ring coupled to theinner handle so as to move in unison therewith said ring being arrangedat the side of the said follower rotatably about the spindle, means forcausing the ring to engage with the follower and make the same turndirectly when the inner handle is turned for operating said latch bolt,said ring being free to move independently in the reversed direction,and means for enabling the ring to arrest said outer handleindependently of the latch bolt when the inner handle is turned in thedirection opposite the normal one.

2. A door lock of the type described, comprising in combination an outerdoor handle, an inner door handle rotatable relative to the outerhandle, a latch bolt, a follower connected to said outer door handle alev r controlled by said follower and serving as operating means betweensaid follower and said latch bolt, a rotatable ring coupled to the innerhandle so to move in unison therewith said ring being arranged at theside of the said follower rotatably about the spiiajlle, means forcausing the ring to engage with the follower and make the sa me t urndirectly when the inner handle is turned for operating said latch bolt,said ring being free to move independently in the reversed direction,and means for enabling the ring to arrest said lever and said outerhandle independently of the latch bolt when the inner handle is turnedin the direction opposite the normal one, said latch bolt being free tomove when said outer handle is thus arrested.

A door lock of the type described, comprising in combination an outerdoor handle. an inner door handle rotatable relative to the outerhandle, a spindle for said inner handle a latch bolt, a followerconnected to said outer door handle, a lever controlled by said followerand serving as operating means between said follower and said latchbolt, a rotatable ring coupled to the inner handle so as to move inunison therewith said ring being arranged at the side of the saidfollower rotatable about the spindle, means for causing the ring to errgage with the follower and make the same turn directly when the innerhandle is turn ed for operating said latch bolt, said ring being free tomove independently in the reversed direction, and means for enabling thering to arrestsaid lever and said outer handle independently of thelatch bolt when the inner handle is turned in the direction opposite thenormal one, said latch bolt being free to move when said outer handle isthus arrested, means enabling said inner handle to arrest both latchbolt and outer handle in another position of reversal, and a yieldablecatch to automatically engage said inner handle in its differentpositions when the inner handle is being turned by hand.

4. A door lock of the type described comprising in combination a latch,an inner handle, a spring controlled follower having spherical cavitiesand rotatable balls in said cavities of the follower designed toautomatically adjust said inner handle accurately in said latch and inthe locking positions when said inner handle is turned by hand.

5. A door lock of the type described comprising in combination with anouter handle and with an inner handle, an axle on said outer handle, ahollow shaft on said inner handle pivotable around said axle of theouter handle and having a angular groove and a cotter for attaching saidhollow shaft of the inner handle on said axle of the outer handleengaging with said groove of the axle of the outer handle so that thehollow shaft of the inner handle is guided in preserving itsrotatability with regard to the axle of said outer handle,

6. A door lock of the type described, com prising in combination withthe cramping board, a lock case composed of two parts stamped from sheetiron each part having a circular aperture with two lateral extensions,two locking cylinders, two opposite lugs late ally projecting from eachof said locking cylinders designed to engage with said lateral extensionof the circular apertures of the parts of the lock case,'and a studprojecting from the end plate of one locking cylinder engaging with acavity of the other locking cylinder said lugs of the locking cylindersserving to secure the locking cylinders in their posl ion in the lockcase when said cylii'idcrs after having been inserted are rotated 90 anda clamping bolt projecting from the crai'nping board of the lock caseand engaging with a groove of one of the locking cylinders.

In testimony whereof I aflix my signature.

lVILHELM HUTTENMANN.

